A US unmanned aerial vehicle. ‘Any suggestion that US or coalition forces played a role in an attack on a Russian base is without any basis in fact,’ the Pentagon said.
Photograph: John Moore/Getty Images

Russia has said that a recent series of drone attacks on its military bases in Syria would have required assistance from a country possessing satellite navigation technology – a statement that appeared to be aimed at the United States.

Russia’s defense ministry said its forces repelled a series of drone attacks on Saturday on the Hemeimeem air base and a naval facility in Tartus, adding that out of the 13 drones involved, seven were shot down and six were forced to land without inflicting any damage.

Without blaming any specific country, the ministry said data for the attacks could only have been obtained “from one of the countries that possesses knowhow in satellite navigation”.

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In Tuesday’s statement, it noted a “strange coincidence” of a US military intelligence plane flying over the Mediterranean near the two Russian bases at the moment of the attack.

The Pentagon denied any involvement. “Any suggestion that US or coalition forces played a role in an attack on a Russian base is without any basis in fact and is utterly irresponsible,” said Marine Maj Adrian Rankine-Galloway, a Pentagon spokesman.

Russia’s President Vladimir Putin declared victory in Syria last month and ordered a partial troops pullout, and the Kremlin said late on Monday that the number of Russian troops left in Syria is sufficient to fend off any attacks by militants.

Asked on Tuesday whether the withdrawal could have been premature in view of the drone attack, Putin’s spokesman, Dmitry Peskov, said the Russian forces in Syria have “all the necessary means” to counter any challenge.

Syria’s President Bashar Assad has recovered major territory from rebels in Syria in the past two years, largely because of Russia’s military support. His forces are currently battling rebels on two fronts, in the north-western Idlib province and in the eastern suburbs of Damascus.